Thomas wallace



(O Model.)

l T. WALLACE ooNDUIT.

Patented Jlly 8, 1890.

, i UNITED STATES PATENT OFFICE.

THOMAS WALLACE, OF NEW YORK, N. Y.

CONDUIT.

srncmcarron forming am of Letters Patent No. 431,630, dated July e, 1890.

Application tiled June 27, 1889. Serial N o. 3.15,'730. (No model.)

To all whom it 11i/ay concern:

Be it' known that I, 'lLHoMAs WALLACE, a citizen of the United States, residing in the city, county, and State of New York, have linvented certain new and,` useful Improvements v and in the means hereinafter set forth for built in accordance with my invention.

supportingthe conductors. y

In the accompanying drawings, Figure l is a transverse section illustrating a conduit Fig. 2 is a sectional plan at the junction of two conduits with a man-hole. Fig. 3 is a sectional elevation on the line 3 3,`Fig. 2. Fig. -t is a longitudinal sectional plan through the conduit. Fig. 5 is a transverse section illustrating the `combination and arrangement with the conduit of a support-as, forinstance, of electrical conductors. l L v -It is common in building electric or other conduits to make the same, of connected seetions of clay or other material, the said sections being connected 'by means of cement, and the material of which they are composed bein gfr-iable and easily broken. The cementing materials employed differ in character from thatof which thesections are composed, so that there never can be a very strong union between the two, and the sections are liable to be separatedv from each other by the sinking of the earth, while they are also liable to b'e disintegrated from the said cause or from superposed pressure or from vibrations resulting from heavy traflic on the streets.

To construct a conduit which is not open Vto the .objectionsalwve specified, l make use` of blocks of any suitable lorm composed of a suitable compositio'mand I cement the blocks 5o Atogether by means ot' the same composition .l

as that of which they are made, so that there is an absolute union between each block and manner is practically continuous and homogeneous throughout its extent. As a result, there are practically nofjoints in the completed structure, and therefore practically no 4:linesfof weakness, as in conduits built up in 'the ordinary'manner, while the conduit may .be erected witbthe same facility astope built tions connected by cemented joints.

Vhile the blocks of which the 'conduitx is built may be made of any suitable composition, II prefer to mold them from a composition vof caleined earth orclay and asphalt, preferably with the mixture of asbestus. In .making such mixture I use the ingredients'in about equal proportions, although the proporsame hot, mold the'blocks thereof in suitable the cement made of the same' materials in a highly -heated condition, also heating the faces that are applied to the cement, so that between the cement and the blocks. The blocks maybe in any form, preferablyin' the shape of slabs or bricks A, and so arranged as to leave .a continuous longitudinal chamber X for the reception of the contents.

At the intersection of streets, or where two or more conduits must be brought together, I form a man-hole by making a hollow cylindrical structure B, built up of .the blocks A', cemented together, as before described, and connected in a like 'manner at the termini at the different conduits D D,.wi'th an opening in the side of the man-hole wall opposite the ch'aunel ixi'e'ach. conduit.

conductors and it is desired to extend any one of the conductors laterally to a house or elsewhere, it may be passed directly through ter, when made as above described, is aperlfleet one of the walls of the conduit to forma the cement, while the conduit built in this tions may be varied to a great extent, mixthe,

there will be an absolute and perfect union fect non-conductor. I prefer, however, to deup of Vbricks and mortar and at a fraction of the expense of one made up of moldedv secmolds, and in building the structure I apply l Where the conduit is to be used for electric i the wall-s of the conduit, inasmuch as the latloop C, as shown in Fig. a, wherever a lateral the conduit, es shown in Fig. 'l.

conductor is to heron, the seid loop inclosing t snmil lateral chamber fr, communicating with the mein vcheinherot the conduit,which chemher e: may he opened et the top or side for the passage of the conductor.

The conduit may he ventilated hy connecting' it with stendpipes,r chimneys, or lempposts, end it may also he provided with e port- (ihl e treme I, adapted to fit transversely Within When the frame is to oe used for electric conductors, it can oe made to support transverse rods a., upon each of which turns loosely,T two or more groovcd dislrs or rollers, and e series of such frames carrying such rollers are arranged :tt proper intervals in the conduit, und the conductors Y ere extended through tho conduitiying in the grooves of the spools. ,By this arrangement ein enabled to readily 'piece the hearings for conductors in suitable position. By having the Ventilating pipes or passages the free play of the air around each conductor is secured, so that instead of moisture heing deposited upon the conductor it is 'i carried from the conduit.

in order te facilitate the passage oi' the conductors through the men-hole from one conduit to enother, provide the letter with rollerheerings suitably arranged to support the conrluctors. Thus opposite each opening y in the Weil ofthe men-hole extends a. rod c, supported by brackets (l L upon which. turn spools Ia', similarto the spools a, :md the con-l ductors from each openngy are passed around seid spools as heel-ings,` and then conducted either directly to the spools at the openingleeding to the other conduit into which the,

ithat ot which conductors ere to entend. or around interme- I dict-e spools arranged as bearings ndjacentto the Wall of the men-hole.

Although l have shoivn and described i series of electric conductors with the conduit, I make no claim to such oouductoishut here oniyintroduced them for thepurpose of illustreting one use to which the conduit could he applied.

Vithout limiting myself to the precise con= struction and arrangement of ports shown, I claim* l. A homogeneous conduit consisting of clocks cemented .together by t cement con sisting ofthe seme mixture or com position as theblocks are molded, subst-sntiztlly as set forth. v

2. A conduit consisting of blocks composed, mainly, of e composition of asphalt end onleined earthy matter connected by :t cement of the seme materiels, substantially es set forth.

3. A homogeneous conduit consisting rf blocks cemented togetherhy cement consisting of the same mixture or composition as that of which the blocks e1e,iuolded, one of the walls off-which. is deflected to form a. loop inclosing a smell lateral chamber as, substcxr tially as described.'

4. The combination, with a continuous and homogeneousconduit, of frames fitted transvorsely within the conduit, substantially asdescribed.

In testimony whereof I have signed my neme to this specification in the presence of twol subscribing witnesses. THOMAS WALLACE.

Witnesses:

GEORGE SEMVIN, STERLING WALLACE. 

